Perhaps norgan can give you answers on the data provided, but I could use more info.

e.g. the operating systems of the laptop and desktop.
the exact model of the Sprint card.
which computer (laptop?) the Sprint card is attached/plugged-in to.
the brand/model of the router.
how the laptop is connecting to the router.
which adapter besides the Sprint card was chosen when ICS was enabled.
status of the windows firewall.

From your perspective most of that probably seems obvious, but it forces too many assumptions on our part to give accurate answers the first time.

I believe any of those units that your adapter would work with would greatly simplify the transition from portable to home sharing. And some could even be run from a lighter socket plug (I think the cradlepoint 350 will even run on batteries) if you want to share the connection while on the go.

Today sees the launch of a new case study, focusing on BYOD technologies we have been working with for some time now. But with the advent of 802.11ac wireless technologies and the story behind our landmark developments, we would like to share this …

This Micro Tutorial will show you how to maximize your wireless card to its maximum capability.
This will be demonstrated using Intel(R) Centrino(R) Wireless-N 2230 wireless card on Windows 8 operating system.

Viewers will learn how to connect to a wireless network using the network security key. They will also learn how to access the IP address and DNS server for connections that must be done manually.
After setting up a router, find the network security…